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(No Model.) 2 Sheets8heet 1.

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APPARATUS FOR TREATING HIDES. I No; 413,601, Patented Oct. 22, 1889.

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(No' Model.) 2 Sheets-Sheet 2. H. E. PREUDENBERG.

APPARATUS FOR TREATING RIDES.

No. 413,601. Patented Oct. 22, 1889.

upllll'llllllll ll Wttnesses I Improvements in Apparatus for the Treat--UNITE STATES j PATENT ()FFIC-E.

HERMANN ERNST Fl tE IIDENBERG, OF VVEINHEIM, BADEN, GERMANY.

APPARATUS FOR TREATING H|DES.

SPECIFICATION forming part of Letters Patent No. 413,601, dated October22, 1889.

Application filed February 16, 1889. Serial No. 300,149. (No model.)

To all whom it may concern:

Be it known that I, HERMANN ERNST FREU- DENBERG, a subject of the GrandDuke of Baden, residing atVVeinheim, German Empire, have inventedcertain new and useful ment of Untanned Hides and Skins, of which thefollowing is a specification.-

In the process of tanning hides and skins the first operation is to soakthe dried or salted skins in water in order to restore their naturalpliability. It is common to aid the softening effect of the water bymeans of various mechanical contrivancessuch as tumblers, stocks, ormangle-rollers-all of which apparatus are designed to soften or breakthe skins by subjecting them to violent action. The next operation isthe fleshing of the skins-that is, the removal from the flesh side ofthe skin of all particles of flesh, fat, veins, and cellularmatter. Thisoperation was most commonly carried out byhand on the tanners beam withthe beam-knife.

Various mechanical devices have been-proposed for fleshing, but havebeen more or less objectionable because they have used rotating spiralknives which cause many cuts in the hide and other defects so long asthey are kept sharp, and on the other hand do not perform their workwhen after a short time they become blunt.

It is the main object of my present invention to do at one operationboth the soften ing and fleshing which have heretofore been twosuccessive operations, and this object I accomplish by theuse of arotary grindingstone with diverging grooves on its periphery, againstwhich the flesh sides of the skins are pressed in the presence of acontinuous Jet of water. For the purpose of increasing the softening andfleshing action of the grinding-stone, I form its periphery or face withdeep grooves which are made to diverge from A the center in order tostretch the skins and to stretch out all folds or wrinkles. I have foundin practice that by this use of a grind ing-stone in connection with thewater-jet,

and particularly when the grinding-surface is grooved, the hides arefleshed more neatly and with less damage than in any other way, and theskins are also softened to a degree 3 hitherto unknown.

, In the accompanying drawings, Figure I is a side elevation partly insection, and Fig. II a front elevation, of a fleshing-machineconstructed according to my invention.

The grinding-stone A, with the shaft 0, rests in the frame 13 and isdriven by a pulley D, a loose pulley D being also provided on the shaft0. As shown in the drawings, the grinding-stone has grooves R divergingfrom the middle of its periphery, which grooves flatten and stretch theskins. A water-pipe leading from a tank w is employed, whereby a streamof water is projected onto the place where the skin comes into contactwith the stone. To the'fixed table E, facing the stone, is attached theupright J, having a movable cushion F, and connected to the table by thelink 0. By means of this upright, which is operated by a pedal-lever H,the required parts of the skin can be pressed against the stone with thedesired degree of No. 107,562, of September 20, 1870; but that machinehas for its sole purpose the breaking or softening of skins by means ofa mangleroller and does no fleshing at all. According to my inventionthe skin is not only softened, but the flesh and cellular matter on theflesh side of the skin are ground off, by means of the rotatinggrinding-surface.

I am aware, also, that in the treatment of leather it is customary touse polishing-wheels, but that is for the treatment of tanned leatherand in a dry or nearly dry state, and must necessarily be without theuse of water.

I am also aware that it has been proposed to treat untanned hides to theaction of. a rotary wheelhaving its periphery coated with sand or emery,but without the use of water.

The natural grinding-stone of my machine will stand the use of waterwhere a wheel lined with emery-cloth or coated with sand or emery wouldnot. In my machine, moreover, the natural sandstone or othergrindingstone has the diverging grooves, so that I flesh andbreak theoperation.

hide at one and the same I claim as my invention In testimony whereof Iafiix my signature in m The herein-described machine for fieshingpresence of two Witnesses.

and softening nntann'ed skins, and comprising a, rotary grinding-stonewith grooves on HERMANN ERNST FREUDENBERG.

5 its periphery diverging from the center toward the edges thereof, asupporting-surface Witnesses:

forthe skins, and a water-supply pipe to di- FRIED. BUSSEMER,

rect a current of water onto the skins under HEINRICH J OCHIM.

treatment, all substantially as described.

